PDF malware analysis — malicious · f8155efec765addc

MALICIOUS

PDF

11.7 KB

MD5: bf0eaa094a8153efb11f362a0b1642d6 SHA-1: 5b9196e4bd2f3d24679d0c51acb8c5b07b58fbfc SHA-256: f8155efec765addcec981c3de9994ed8df4697e7bf0ccb3e1e01666a1e4ebfc9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link or Document: Malicious Link T1204.002 Malicious Link or Document: Malicious Document

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, as indicated by the 'Collab.collectEmailInfo' heuristic. The analysis also identified two deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggesting a multi-stage attack. The primary JavaScript action likely serves to download and execute a secondary payload, consistent with the 'Pdf.Exploit.Agent-36065' ClamAV detection.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `ccfc16387d79da3b03d6058ef26fa3ec37bb341831b91801293d7b585a3bf39b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11974 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `100a8d3fbe760557ca0c519a1a799d52bf38ae2d8ffa8f3e2f99d441a85760fd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4904 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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